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# Tix Demostration Program

#

# This sample program is structured in such a way so that it can be

# executed from the Tix demo program "widget": it must have a

# procedure called "RunSample". It should also have the "if" statment

# at the end of this file so that it can be run as a standalone

# program using tixwish.

# Demonstrates how to use compound images to display icons in a canvas widget.

#

proc RunSample {w} {

    set top [frame $w.f -bd 1 -relief raised]

    set box [tixButtonBox $w.b -bd 1 -relief raised]

    pack $box -side bottom -fill both

    pack $top -side top -fill both -expand yes

    label $top.lab -text "Drag the icons"

    pack $top.lab -anchor c -side top -pady 4

    # Create the canvas to display the icons

    #

    set c [canvas $top.c -relief sunken -bd 1]

    pack $c -side top -expand yes -fill both -padx 4 -pady 4

    # create several compound images in the canvas

    #

    set network  [tix getimage network]

    set harddisk [tix getimage harddisk]

    set cmp_1 [image create compound -window $c -bd 1]

    $cmp_1 add image -image $network

    $cmp_1 add line

    $cmp_1 add text   -text " Network "

    set cmp_2 [image create compound -window $c -bd 1]

    $cmp_2 add image -image $harddisk

    $cmp_2 add line

    $cmp_2 add text   -text " Hard disk "

    set cmp_3 [image create compound -window $c -bd 1 \

        -background #c0c0ff -relief raised \

        -showbackground 1]

    $cmp_3 add image -image $network

    $cmp_3 add line

    $cmp_3 add text   -text  " Network 2 "

    $c create image  50  50  -image $cmp_1

    $c create image 150  50  -image $cmp_2

    $c create image 250  50  -image $cmp_3

    bind $c <1>         "itemStartDrag $c %x %y"

    bind $c <B1-Motion> "itemDrag $c %x %y"

    # Create the buttons

    #

    $box add ok     -text Ok     -command "destroy $w" -width 6

    $box add cancel -text Cancel -command "destroy $w" -width 6

}

proc itemStartDrag {c x y} {

    global lastX lastY

    $c raise current

    set lastX [$c canvasx $x]

    set lastY [$c canvasy $y]

}

proc itemDrag {c x y} {

    global lastX lastY

    set x [$c canvasx $x]

    set y [$c canvasy $y]

    $c move current [expr $x-$lastX] [expr $y-$lastY]

    set lastX $x

    set lastY $y

}

if {![info exists tix_demo_running]} {

    wm withdraw .

    set w .demo

    toplevel $w

    RunSample $w

    bind $w <Destroy> exit

}